Combustible Dust Testing

Laboratory testing to quantify dust explosion & reactivity hazards

Flammable Gas & Vapor Testing

Laboratory testing to quantify explosion hazards for vapor and gas mixtures

Chemical Reactivity Testing

Laboratory testing to quantify reactive chemical hazards, including the possibility of material incompatibility, instability, and runaway chemical reactions

DIERS Methodology

Design emergency pressure relief systems to mitigate the consequences of unwanted chemical reactivity and account for two-phase flow using the right tools and methods

Deflagrations (Dust/Vapor/Gas)

Properly size pressure relief vents to protect your processes from dust, vapor, and gas explosions

Effluent Handling

Pressure relief sizing is just the first step and it is critical to safety handle the effluent discharge from an overpressure event

Thermal Stability

Safe storage or processing requires an understanding of the possible hazards associated with sensitivity to variations in temperature

UN-DOT

Classification of hazardous materials subject to shipping and storage regulations

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Biological

Model transport of airborne virus aerosols to guide safe operations and ventilation upgrades

Radioactive

Model transport of contamination for source term and leak path factor analysis

Fire Analysis

Model transport of heat and smoke for fire analysis

Flammable or Toxic Gas

transport of flammable or toxic gas during a process upset

OSS consulting, adiabatic & reaction calorimetry and consulting

Onsite safety studies can help identify explosibility and chemical reaction hazards so that appropriate testing, simulations, or calculations are identified to support safe scale up

Mechanical, Piping, and Electrical

Engineering and testing to support safe plant operations and develop solutions to problems in heat transfer, fluid flow, electric power systems

Battery Safety

Testing to support safe design of batteries and electrical power backup facilities particularly to satisfy UL9540a ed.4

Hydrogen Safety

Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen

Spent Fuel

Safety analysis for packaging, transport, and storage of spent nuclear fuel

Decommissioning, Decontamination and Remediation (DD&R)

Safety analysis to underpin decommissioning process at facilities which have produced or used radioactive nuclear materials

Laboratory Testing & Software Capabilities

Bespoke testing and modeling services to validate analysis of DD&R processes

Nuclear Overview

Our Nuclear Services Group is recognized for comprehensive evaluations to help commercial nuclear power plants operate efficiently and stay compliant.

Severe Accident Analysis and Risk Assessment

Expert analysis of possible risk and consequences from nuclear plant accidents

Thermal Hydraulics

Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions

Environmental Qualification (EQ) and Equipment Survivability (ES)

Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions

Laboratory Testing & Software Capabilities

Testing and modeling services to support resolution of emergent safety issues at a power plant

Adiabatic safety calorimeters (ARSST and VSP2)

Low thermal inertial adiabatic calorimeters specially designed to provide directly scalable data that are critical to safe process design

Other Lab Equipment (DSC/ARC supplies, CPA, C80, Super Stirrer)

Products and equipment for the process safety or process development laboratory

FERST

Software for emergency relief system design to ensure safe processing of reactive chemicals, including consideration of two-phase flow and runaway chemical reactions

FATE

Facility modeling software mechanistically tracks transport of heat, gasses, vapors, and aerosols for safety analysis of multi-room facilities

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Resources

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Recent Posts

Thermal Hazards Reaction and Adiabatic Calorimetry Testing

Posted by The Fauske Team on 10.15.18
Thermal stability and chemical test

Engineer running a test on the
Mettler Toledo RC1 reaction calorimeter

Thermal stability (or thermal hazards) testing collects reaction rate data and applys that data to assess whether a specified quantity of material can be used in a way such that runaway reactions are avoided. This is important when considering processing, long-term storage, or shipping of a material. A comprehensive lab uses many tools to understand and eliminate undesired reactions, accommodate process upset scenarios and design a client’s desired process chemistry.

Do you recognize the importance of these in your thermal stability testing?

  • Safe Scale-up
  • Reaction Rates
  • Heat of Reaction
  • Heat of Mixing
  • Heat of Dissolution
  • Adiabatic Temperature Rise
  • Heat Capacity of Reaction Mass
  • Heat Flow and Adiabatic Calorimetry
  • Low-phi Factor (directly scalable) adiabatic calorimetry
  • UN Transport Testing
  • Practical Emergency
  • Vent Sizing (PrEVentTM)
  • Software
ChemiSens reaction caliometry
ChemiSens CPA202

Reaction calorimetry testing and consulting services are designed to help you better understand your desired process chemistry. One of the keys to safely scaling up a chemical process is managing the energy or heat flux that the intended chemical reaction produces, especially when that chemical transformation is exothermic in nature. When considering process scale-up whether the heat is removed via a jacket, a condenser, or a side loop heat exchanger in the plant reactor, or partially allowed to heat up the mass, it is imperative to balance the cooling capacity at scale versus the projected heat flux rate and understand the total energy available due to the desired reaction should that cooling fail. The accepted technique for gathering this type of data in the industry is known as reaction calorimetry.

There have been many instruments developed over the years to accomplish this task and Fauske & Associates, LLC (FAI) maintains a variety of devices so that we can design the most appropriate experiment to gather the vital heat rate and adiabatic potential data needed for a safe scale up. Couple this with our vast experience in characterizing runaway reaction behavior using adiabatic and vent sizing calorimetry and we can deliver you a complete picture of a safe chemical process.

We currently utilize three Reaction Calorimeters of varying size and capability:

THT-μ RC - The reactor is simply a GC vial or a metal pressure (SS or HC) cell, volume ~1.5 ml. Modes of operation include isothermal with steps, titration with an integrated syringe pump, scan and hold (2˚C/min max) and heat capacity determination. FAI is also developing this device for measuring binary compatibilities.

Mettler-Toledo RC1 - The RC1 is a heat flow calorimeter. As such, the heat leaving or entering the reactor is characterized by UA (Tr-Tj), where U is the overall heat transfer coefficient, A is the area of heat transfer and Tr and Tj are the temperature of the reactor and jacket, respectively.

ChemiSens - The ChemiSens is a heat flux calorimeter that provides a true heat flow signal without requiring any calibration. The heat transfer surface is entirely through the bottom of the reactor making use of Peltier technology, and is independent of the heat transfer coefficient as defined above.

Thermal stability test
Testing in the Thermal Activity Monitor (TAM®)

Adiabatic calorimetry testing provides data for relief system design, safe scale-up of chemical processes, and changes to process recipes.  Safe process design requires knowledge of chemical reaction rates, character and energy release - all of which can be obtained from a low phi-factor adiabatic calorimeter such as the VSP2TM (Vent Sizing Package 2) or ARSSTTM (Advanced Reactive System Screening Tool).To determine critical safety parameters to avoid undesired reactions, FAI performs heat flow and adiabatic calorimetry using VSP2TM, ARSSTTM, Thermal Activity Monitor (TAM), Seteram C80, Accelerating Rate Calorimeter (ARC®), Differential Scanning Calorimeter (DSC), Thermal Gravimetric Analysis (TGA), AKTS Software used to determine:

  • Onset Temperature
  • Time to Maximum Rate (TMR)
  • 24 Hour Adiabatic Decomposition Temperature (ADT24)
  • Temperature to Avoid Thermal Runaway - Critical Temperature of a Vessel
  • Self-Accelerating Decomposition Temperature (SADT)

Low-phi factor (directly scalable) adiabatic calorimetry using the VSP2TM & ARSSTTM provides information to understand and accommodate process upset scenarios. These tests determine:


  • Adiabatic Temperature Rise Rates
  • Adiabatic Pressure Rise Rates
  • Pressure-Temperature Profile
  • Design Vessel Relief Systems

If you enjoyed learning about adiabatic calorimetry, check out our case study on low thermal inertia adiabatic calorimetry.  In this case study, FAI performs tests to determine what is the self accelerating decomposition temperature of a 50 kg package of azodicarbonamide. Download the case study now to to learn more about AKTS software, self accelerating decomposition temperature, the United States SADT test, and much more.


Download Now

Topics: thermal stability, reaction calorimetry, adiabatic calorimetry, thermal hazard

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